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Discovered cause of clears: stale code. Tweaked persistence, again.

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This commit is contained in:
Thomas Harte 2016-05-01 22:28:33 -04:00
parent 09ed8eb654
commit c93bcf9f28
3 changed files with 21 additions and 25 deletions
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21
Outputs/CRT/Internals/CRTOpenGL.cpp
View File

@ -101,7 +101,7 @@ OpenGLOutputBuilder::OpenGLOutputBuilder(unsigned int buffer_depth) :
_buffer_builder = std::unique_ptr<CRTInputBufferBuilder>(new CRTInputBufferBuilder(buffer_depth));
glBlendFunc(GL_SRC_ALPHA, GL_CONSTANT_COLOR);
glBlendColor(0.4f, 0.4f, 0.4f, 0.5f);
glBlendColor(0.6f, 0.6f, 0.6f, 1.0f);
// Create intermediate textures and bind to slots 0, 1 and 2
compositeTexture = std::unique_ptr<OpenGL::TextureTarget>(new OpenGL::TextureTarget(IntermediateBufferWidth, IntermediateBufferHeight, composite_texture_unit));
@ -206,7 +206,13 @@ void OpenGLOutputBuilder::draw_frame(unsigned int output_width, unsigned int out
if(framebuffer)
{
new_framebuffer->bind_framebuffer();
glClear(GL_COLOR_BUFFER_BIT);
glActiveTexture(pixel_accumulation_texture_unit);
framebuffer->bind_texture();
framebuffer->draw((float)output_width / (float)output_height);
new_framebuffer->bind_texture();
}
framebuffer = std::move(new_framebuffer);
glActiveTexture(source_data_texture_unit);
@ -303,6 +309,13 @@ void OpenGLOutputBuilder::draw_frame(unsigned int output_width, unsigned int out
else
perform_output_stage(output_width, output_height, rgb_shader_program.get());
// copy framebuffer to the intended place
glDisable(GL_BLEND);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glViewport(0, 0, (GLsizei)output_width, (GLsizei)output_height);
glClear(GL_COLOR_BUFFER_BIT);
framebuffer->draw((float)output_width / (float)output_height);
// drawing commands having been issued, reclaim the array buffer pointer
glBindBuffer(GL_ARRAY_BUFFER, output_array_buffer);
_output_buffer_data = (uint8_t *)glMapBufferRange(GL_ARRAY_BUFFER, 0, OutputVertexBufferDataSize, GL_MAP_WRITE_BIT | GL_MAP_UNSYNCHRONIZED_BIT);
@ -340,7 +353,6 @@ void OpenGLOutputBuilder::perform_output_stage(unsigned int output_width, unsign
// update uniforms (implicitly binding the shader)
if(_last_output_width != output_width || _last_output_height != output_height)
{
glClear(GL_COLOR_BUFFER_BIT);
shader->set_output_size(output_width, output_height, _visible_area);
_last_output_width = output_width;
_last_output_height = output_height;
@ -353,11 +365,6 @@ void OpenGLOutputBuilder::perform_output_stage(unsigned int output_width, unsign
glDrawArrays(GL_TRIANGLE_STRIP, drawing_zones[c*2] / OutputVertexSize, drawing_zones[c*2 + 1] / OutputVertexSize);
}
}
// copy to the intended place
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glClear(GL_COLOR_BUFFER_BIT);
framebuffer->draw((float)output_width / (float)output_height);
}
}

2
Outputs/CRT/Internals/Shaders/OutputShader.cpp
View File

@ -74,7 +74,7 @@ std::unique_ptr<OutputShader> OutputShader::make_shader(const char *fragment_met
"void main(void)"
"{"
"fragColour = vec4(%s, 0.7*cos(lateralVarying));"
"fragColour = vec4(%s, 0.5*cos(lateralVarying));"
"}",
sampler_type, fragment_methods, colour_expression);

23
Outputs/CRT/Internals/TextureTarget.cpp
View File

@ -124,25 +124,14 @@ void TextureTarget::draw(float aspect_ratio)
buffer[14] = buffer[10];
buffer[15] = buffer[7];
// determine positions
// determine positions; rule is to keep the same height and centre
float internal_aspect_ratio = (float)_width / (float)_height;
float aspect_ratio_ratio = internal_aspect_ratio / aspect_ratio;
if(aspect_ratio_ratio >= 1.0f)
{
// output is thinner than we are; letterbox
buffer[0] = -1.0f; buffer[1] = -1.0f / aspect_ratio_ratio;
buffer[4] = -1.0f; buffer[5] = 1.0f / aspect_ratio_ratio;
buffer[8] = 1.0f; buffer[9] = -1.0f / aspect_ratio_ratio;
buffer[12] = 1.0f; buffer[13] = 1.0f / aspect_ratio_ratio;
}
else
{
// output is wider than we are; pillarbox
buffer[0] = -aspect_ratio_ratio; buffer[1] = -1.0f;
buffer[4] = -aspect_ratio_ratio; buffer[5] = 1.0f;
buffer[8] = aspect_ratio_ratio; buffer[9] = -1.0f;
buffer[12] = aspect_ratio_ratio; buffer[13] = 1.0f;
}
buffer[0] = -aspect_ratio_ratio; buffer[1] = -1.0f;
buffer[4] = -aspect_ratio_ratio; buffer[5] = 1.0f;
buffer[8] = aspect_ratio_ratio; buffer[9] = -1.0f;
buffer[12] = aspect_ratio_ratio; buffer[13] = 1.0f;
// upload buffer
glBindBuffer(GL_ARRAY_BUFFER, _drawing_array_buffer);